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Catalyst for coal-to-natural gas methanation reactor and preparation method thereof

A methanation reactor and coal-to-natural gas technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems that are not suitable for coal-to-natural gas projects, Lack of operating experience, small number of developments, etc., to reduce the risk of cracking carbon deposits, easy to clean and remove, and easy to operate

Active Publication Date: 2011-11-30
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the current methanation catalysts are not suitable for coal-to-natural gas projects, and there is also a lack of operating experience in the complete methanation process of coal-to-synthesis gas. It is necessary to carefully study the applicable range of catalysts during the inspection.
However, the number of complete methanation catalysts suitable for coal-to-natural gas projects is relatively small, and most of them have not been verified by large-scale projects, especially the stability of long-term operation under harsh conditions of high temperature (above 600°C) and high pressure (above 3MPa). still needs optimization

Method used

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  • Catalyst for coal-to-natural gas methanation reactor and preparation method thereof

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Embodiment 1

[0032] In this embodiment, a catalyst for a coal-to-natural gas methanation reactor mainly includes an active component, a carrier, a first auxiliary agent, a second auxiliary agent and graphite, wherein the mass percent content of each component is: NiO: 10% 、Al 2 o 3 : 75%, CeO 2 : 5%, CuO: 8%, graphite 2%.

[0033] In this embodiment, a catalyst for a coal-to-natural gas methanation reactor is prepared by a method comprising the following main steps:

[0034] Step 1: take by weighing 19.46 grams of hydrated nickel nitrate Ni (NO 3 ) 2 ·6H 2 O, 7.96 grams of ammonium cerium nitrate (NH 4 ) 2 Ce(NO 3 ) 6 , 12.15 grams of hydrated copper nitrate Cu(NO 3 ) 2 ·3H 2 O, 275.94 grams of hydrated aluminum nitrate Al(NO 3 ) 3 9H 2 0 and 78.73 grams of urea, then each material taken by weighing is dissolved in deionized water and diluted to 2500ml to form a mixed solution, calculated according to all metal ions in the precipitation solution, and the precipitation agent ...

Embodiment 2

[0041] In this embodiment, a catalyst for a coal-to-natural gas methanation reactor mainly includes an active component, a carrier, a first auxiliary agent, a second auxiliary agent and graphite, wherein the mass percent content of each component is: NiO: 40% 、Al 2 o 3 : 40%, Sm 2 o 3 : 8%, CuO: 10%, graphite 2%.

[0042] In this embodiment, a catalyst for a coal-to-natural gas methanation reactor is prepared by a method comprising the following main steps:

[0043] Step 1: take by weighing 77.86 grams of hydrated nickel nitrate Ni (NO 3 ) 2 ·6H 2 O, 10.19 grams of hydrated samarium nitrate Sm (NO 3 ) 2 ·6H 2 O, 15.19 grams of hydrated copper nitrate Cu (NO 3 ) 2 ·3H 2 O, 147.17 grams of hydrated aluminum nitrate Al(NO 3 ) 3 9H 20 and 71.51 grams of urea, then each material taken by weighing is dissolved in deionized water and diluted to 2500ml to form a mixed solution, calculated according to all metal ions in the precipitation solution, and the precipitation a...

Embodiment 3

[0050] In this embodiment, a catalyst for a coal-to-natural gas methanation reactor mainly includes an active component, a carrier, a first auxiliary agent, a second auxiliary agent and graphite, wherein the mass percent content of each component is: NiO: 23% 、Al 2 o 3 : 60%, La 2 o 3 : 10%, CuO: 5%, graphite 2%.

[0051] In this embodiment, a catalyst for a coal-to-natural gas methanation reactor is prepared by a method comprising the following main steps:

[0052] Step 1: take by weighing 44.77 grams of hydrated nickel nitrate Ni(NO 3 ) 2 ·6H 2 O, 10.52 grams of hydrated lanthanum nitrate La(NO 3 ) 3 ·6H 2 O, 7.59 grams of hydrated copper nitrate Cu (NO 3 ) 2 ·3H 2 O, 220.75 grams of hydrated aluminum nitrate Al(NO 3 ) 3 9H 2 0 and 73.48 grams of urea, then each material taken by weighing is dissolved in deionized water and diluted to 2500ml to form a mixed solution, calculated according to all metal ions in the precipitation solution, and the precipitation ag...

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Abstract

The invention discloses a catalyst used in a coal natural gas methanation reactor. The catalyst comprises the following components in percentage by weight: 10-40% of an active component, 40-75% of a carrier, 5-20% of a first auxiliary agent, 2-15% of a second auxiliary agent and 2% of graphite, wherein the active component is NiO; the carrier is Al2O3; the first auxiliary agent is one or two of rare earth metal oxide La2O3, CeO2 or Sm2O3; and the second auxiliary agent is CuO. The preparation method of the catalyst comprises the following steps: preparing a mixed solution, heating and precipitating, filtering the precipitate, washing a filter cake, drying, baking and shaping. The obtained catalyst has the advantages of simple components, low cost, good catalytic activity and high stability, and is easy to prepare.

Description

technical field [0001] The invention belongs to the technical field of methanation catalysts, in particular to a catalyst used in a coal-to-natural gas methanation reactor and a preparation method thereof. Background technique [0002] The basic process of the coal-to-natural gas process is to convert the raw coal into a gas rich in CO and H through large-scale coal gasification technology. 2 Syngas, water vapor shift adjustment n(H 2 ) / n(CO) after purification technology to remove impurities such as sulfides in the syngas, and introduce it into the methanation reactor. Under certain temperature and pressure and the action of catalyst, CO and H 2 Synthesis of CH by an exothermic reaction 4 , and finally through processes such as decarburization and enrichment, CH 4 Synthetic Natural Gas (SNG) with a content greater than 90%. In this process, gas methanation is a key step, and a methanation catalyst with excellent performance is an important factor to improve the efficien...

Claims

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Application Information

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IPC IPC(8): B01J23/83C10L3/08
Inventor 许世森陈亮徐越王保民
Owner HUANENG CLEAN ENERGY RES INST
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